On Feb. 28, 2011, Pole 2 of State Grid Corporation of China's Ningdong-Shandong 660-kV high-voltage direct-current (HVDC) connection was inaugurated, and the line has been fully tested at full 4,000-MW power in bipole mode.

Ningdong-Shandong HVDC connection transmits power from the Yinchuandong converter station in central North China to the Tsingdao converter station on the eastern coast, more than 1,335 km (830 miles). Pole 1 of the Ningdong-Shandong connection became operational on Nov. 28, 2010, transmitting 2,000 MW of power.

This is a significant achievement for Alstom Grid and its Chinese partner China Electric Power Research Institute. This is the first 660-kV HVDC link in the world, and it comprises Alstom Grid's new higher-rated valve design. The Thyristor valves are the most powerful ever put in operation worldwide for an HVDC scheme.

The project was delivered on a tight contract schedule, with the first deliveries in less than four months and stations commissioned in less than two years after contract signature.

Learn more at www.alstom.com.